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Jodd VTor is focused validation framework for any Java object.

There is a newer version: 5.3.0

// Copyright (c) 2003-2014, Jodd Team (jodd.org). All Rights Reserved.

package jodd.vtor.constraint;

import jodd.bean.BeanException;
import jodd.bean.BeanUtil;
import jodd.vtor.ValidationConstraint;
import jodd.vtor.ValidationConstraintContext;
import jodd.vtor.VtorException;

public class EqualToDeclaredFieldConstraint implements ValidationConstraint {

	public EqualToDeclaredFieldConstraint() {
	}

	public EqualToDeclaredFieldConstraint(String fieldName) {
		this.fieldName = fieldName;
	}

	// ---------------------------------------------------------------- properties

	protected String fieldName;

	public String getFieldName() {
		return fieldName;
	}

	public void setFieldName(String fieldName) {
		this.fieldName = fieldName;
	}

	// ---------------------------------------------------------------- configure

	public void configure(EqualToDeclaredField annotation) {
		this.fieldName = annotation.value();
	}

	// ---------------------------------------------------------------- valid

	public boolean isValid(ValidationConstraintContext vcc, Object value) {
		return validate(vcc.getTarget(), value, fieldName);
	}

	public static boolean validate(Object target, Object value, String fieldName) {
		if (value == null) {
			return true;
		}
		Object valueToCompare;
		try {
			valueToCompare = BeanUtil.getDeclaredProperty(target, fieldName);
		} catch (BeanException bex) {
			throw new VtorException("Invalid value: " + fieldName, bex);
		}
		if (valueToCompare == null) {
			return false;
		}
		return value.equals(valueToCompare);
	}
}